Mechanical stoker.



A. G. ELVIN. MECHANICAL STOKER. APPLIGATION F1LED'ocT-zs, 1912.

1,058,356. Patented Apr. 8, 1913.

6 SHEETS-SHEET l. W

A. G. ELVIN.

MECHANICAL STOKER.

APPLIGATION FILED 0012.23, 1912,

Patented Apr. 8, 1913.

6 SHEETS-SHEET 2.

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ITNESS S A. G. ELVIN.

MEGHANICAL STOKER.

APPLIOATIGN FILED DGT. 23, 1912.

Patented Apr. 8, 1913.

6 SHEETS-SHEET 3.

6a/fw A. G. BLVIN.

MBCHANIGAL sToKBR.

APPLICATION FILED 00T. 23, 1912.

Patented Apr, 8, 1913.

wrrNEssE v i L ff/ ciw/4 A. G. ELVIN.

MECHANICAL STOKEB..

APPLICATION FILED 00T. 23, 1912. i

Patented Apr` 8, 1913.

6 sisma-SHEET G.

ALBERT G. ELVIN, OF rSOIVIERVILILIE, NEW JERSEY.

MECHANICAL STOKER.

Specification of Letters Patent.

Patented Apr. 8, 1913.

Application area october es, 191,2. serial No. 727,338.

head and so-called scat-ter type, in which the fuel is mechanicallyprojected into' the furnace, above its grate, and distributed over thesurface thereof, through the momentum imparted to successively suppliedquant-ities of fuel by the movements of power actuated members withwhich they are brought. into contact. Certain of its features arehowever, equally applicable in mechanical stokcrs of other types. A

The object of my invention is to provide a mechanical stoker, of theclass above described, which shall present the advantages ofcomparatively simple and inexpensive construction; ready applicabilityin connection with the furnaces of locomotives of any of the presentstandard types, freedom from interference with ordinary 'hand firing,should such operation become necessary or desirable; and capability, inoperation, of closely approximating the results, as to proper.distribution of the fuel ov-er the entire area of the grate, of themanual labor of a competent fireman.

'.lhe improvement claimed is hereinafter full-y set forth.

In the accompanying drawings: Figure l is a view, partly in sideelevation and partly in section, of the adjoining portions of a coupledlocomotive engine and tender, illustrailing an application of myinvention; Fig. 2, a vertical longitudinal central section through amechanical Stoker embodying my inventiom'and through the rear water wallof the irebox of a locomotive engine, and a portion of thc tender onwhich it is applied; Fig.' 2, a transverse section through the conveyercasing, showing the fuel agitator; Fig. 3, a rear View, partly insection, of the apparatus, with the screw "conveyer removed F 4, a planview of the shovel boX and a portion of the elevator casing; Fig. '5,

`which there extends a screw conveyer, 2

a horizontal section, on the line a a of Fig. 3; Fig. G, a view,partlyin plan, and partly in horizontal section on the line l) 7) of Fig. 3;Fig. 7, a view, partly inrear elevation and partly in verticaltransverse section, on

, the line o 0 of Fig. 5; Fig. 8, a vertical transverse section, on theline d Z of Fig. 5; Fig. 9, a View, similar to Fig. 4, illustrating astructural modification; and, Fig. 10, a plan view of the gearing foractuating the shovels of the construction shown in Fig. 9.

Referring first to Figs. l to 8 inclusive of the drawings, my inventionis herein exempliicd in connection with a locomotive engine (indicatedas a whole by B) and atender (indicated as a whole by A) which arecoupled together for service, in the ordinary manner, by a draw bar C,my invention being applied, for the purpose of mechanically conveyingfuel from the coalspace, a, of the tender, to the firing door opening,of the irebox, I), of the locomotive, and intermittently projectingapportioned quantities of the fuel through said opening into the rebox.To this end, I provide (a), 'a fluid pressure motor, which yactuates, inappropriate relation and sequence, as hereinafter described, thefollowing operating instru? mcntalities, to wit: (b), a conveyer bywhich fuel 'is transferred from the coal bin of the tender to thevicinity of t-he firebox of the locomotive; (c), an elevator to whichfuel'is delivered by the conveyer and by which it is raised to theproper level for firing; (d), a

. shovel box or receptacle to which fuel is delivered by the elevator;(e), a swinging shovel by which fuel is carried from a location ofdeposit in theshovel box and projected into the iirebox; and (f),intermediate mechanism through which said shovel is actuated by themotor.

In the practice of my invention,- I provide, at the front end of thecoal space, u, l 'of the tender, a supply hopper, 1, through which thefuel yis supplied by gravity to the rear end of a 'longitudinal casing,2n, in

l n u having end ]ournals, 2", 2c, which are mounted in bearings, 2d, inthe casing. An agitator, 8, 1n the form of a vertically extcnding arm isjournaled on a pin, 3, at

the rear end of the casing, said agitator extending upwardly into thecoal space. The lower end of the agitator' is forked and lits a cam oreccentric, 3", on the rear journal, 2b, of the conveyer, by the rotationof which the agitator is'. vibrated about the axis of the pin, 3, so asto stir up the fuel above it and prevent it from clogging in thehopper, 1. The forward journal of the conveyer is coupled, by auniversal joint, 2, to the shaft, 4, of a sprocket wheel, 49, which isrotated by a chain, 4th engaging the teeth of said wheel and of asimilar wheel, 5b, xed on the drivingrshaft 5, of a fluid pressuremotor, 5, supporte on a bracket, 5,xedto .the back head 'of the irebox.The motor, 5, does/ not, in and of itself, form part of-my presentinventionand vmay be 'of any suitable and preferred construction, manyforms of which are familiar to those skilled in the art,- and it willnot therefore be herein in detail described. As indicated in thedrawings, the motor,l 5, accords substantially with 'that which is setvforth in Letters Patent of the United States No.` 1,050,528, grantedand issued to me under ydate of January 14,1913, this construction beingspecially desirable for application in the apparatus of my presentinvention.

The conveyer casing, 2, is supported,

near its r'ear end, in a yoke, 6, which is pro vided with a downwardlyextending pin, (5,

journaled in a bearing, 6b, fixed to the tender frame. The conveyercasing is iitted with a shoe, 2f, which bears on the upper face of theyoke, 6, said face being curved in lthe direction of the length of thecasing,

as shown in Fig. 2, so'as to admit of a limited degree of slidingmovement of the casing. The forward end of the casing is supported 4in aspherical socket bearing, 7,

.fixed to the framing of the locomotive, said bearing receiving a' ballmember, 7, on the lower end of theyoke, 7", secured to the conveyercasing. By reason of the swiveling movement of the casing permitted bythe bearings above described, all relative movements of the locomotive|and vtender are compensated for, and the normal operative relation ofthe conveyer and motor is at all times maintained.

The fuel which is carried, b the rotation of the conveyer, from the tener to the forward end of the conveyer casing, is dropped therefrom intoa hopper, 8g, the bottom of which is opened to the lowertransversemember of anv elevator casing, 8, of substantially rectangularform, with properly :roundedl corners,f within which there is tted totraverse, an elevator chain, 8, rovided with a plurality of f flights orblades, 8", which fit 'freely .within the casing, 8, and are spaced atequal intervals apart on the elevator chain, which chain is carried onguide sprocket wheels, 8c. Longitudinal movement within the casing, inthe direction of the arrows, Fig. 3, is imparted by the motor, 5, to theelevator chain and connected flights, through a chain, 4c, passingaround a sprocket wheel, 8d, on the shaft, Se, .of one of the guidesprocket wheels, and around a sprocket wheel, 4, on the shaft, 2l, whichas before described, is rotated by the motor, 5. The speed of the screwconveyer is such that only su'tlicient fuel will be dropped into each ofthe spaces between the flights to ill approximately one half of saidspace, in order to prevent fuel being dropped from the elevator casinginto the shovel box hereinafter deforward position.

A discharge passage, 8f, is formed centrally in the upper member of theelevator casing, 8, immediat/ely above, and establishing communicationwith, a shovel box, 9, which is fixed to, and supported b a bracket, 9,secured to the rear head o the rebox, b. The forward side of the shovelbox is fully open to the firing door opening, b', of the lire box, nearthe lower side thereof, so as to leave as much as possible of theupperportion of said opening unobstructed, said upper portion beingclosed by firing doors, 10, of the ordinary construction. By the usualmanipulation of said doors by a hand lever, 10%, manual tiring canbeoperated, if it should,- at any time, become necessary or desirable tointermitthe operation of 'the mechanism of my invention.

The fuel which is raised in the elevator casing, S, and carried to thedischarge passage, 8f, by each of the'ilights, 8", drops through thedischarge opening into the shovel box, 9, from whichy the successiveportions or charges contained in the spaces between the flights, areprojected, alternately, into the firebox, by swinging movements of oneor the other of two fuel carrying and throwing shovels, each comprisinga stock or body, 1 1, and a blade, 1l, of stout sheet metal, wh1ch 1scurved longitudinhlly, and also curved'or bent transversely, as shown inFigs. f2, 3, 4, and 9, thereby enabling it -to receive and carry, in itsmovements, a charge of fuel, in the manner of an ordinary firemansshovel orscoop. The shovels 11` 11, are fixed upon the squared upperends of two shovel shafts, 12, the axes of which arelooated on oppositesides of the shovel box, 1n a common plane which is substantiallyparallel with lthe back head of the 'Iirebo-x, and therefore eithervertical, or, as inthe instance shown, slightly forwardly inclined. Theoutward or feeding traverses of the shovels, in each of which they carrya charge of fuel, are eiected by fluid pressure mchnlSm, by which thevare scribed, while one of the shovels is in its e located in` a planecoincident or parallel ed by Huid under pressure, preferably comlstems,13f, are peripherally recessed below .haast ports, 13.

swung comparatively rapidly in said outh ward or feeding traverses, andin their inward or return traverses, they are actuated mechanically andmore slowly, by gea-ringdriven by the motor,.5, which operates' the.'yconveyer and elevator hereinbefore set forth. The -mechanism by whichthe shovels arel` operated in the manner above recited, willi now bedescribed. l Two fluid pressure cylinders, 13, 13, the,y axes of whichare located in a plane-at right; angles to that of the shovel shafts,12, are; suitably supported below the shovel box, 9,f each of saidcylinders adjoining, at one end, one of the shovel shafts. The rear endsof' the cylinders are closed by removable heads, 13, and their forwardends by heads, 13" in which are formed supply and exhaust` portshereinafter described. Each cylinder is fitted with a piston, 14, in themiddle portion of which there is formed a trans-' y verse slot havingoppositely inclined bearing. faces which abut against an arm,'15, fixeupon a gear shaft, 15, the axis of which isl with the axial plane oftheadjacent shovel shaft, 12. The arm, 15a, passes freely' through, andswings in, a slotforfned in one side of the cylinder, all as clearlyshown in Fig. 5. A segment gear, 15", fixed onv cach of the gear shafts,engages a corresponding pinion, 12a, on the adjacent shovel shaft, 12,which, by such engagement will be swung in its bearings coincidentlywith the longitudinal movement of the piston, 14, whether such swingingmovement. is effected by the movement of said piston, as in the outwardor feeding traverses ofthe shovel, or by the application of power fromthe motor, 5, as in the inward or return traverses.

The movements of the pistons, 14, by which they actuate the shovelshafts, in the feeding traverses of the shovels, are effectpncssed air,which is admitted, from a suitable source of supply,"to the forward endsof the cylinders, 13, through supply ports, 13e, to admission ports,13d, controlled by supply valves, 13e, which are fixed upon stems, 13f,and are normally held seated by the pressure above 'them .and bysprings, 13g. The motive fluid is preferably discharged from the exhaustports through discharge pipes, 13, leading into the shovel box, adjacentto the shovel shafts, in order to prevent the accumulation of particlesof fuel on the outer sides of t-he shovels. The

the supply valves, and the portions of their peripheries below therecesses, perform the functions of exhaust Valves governing ex- Thestems, 13, bear on the peripheries of cams,16, fixed on cam shafts,

16, journaled in bearings below the cylinders, by the rotation of whichshafts the supply and exhaust valves are alternately unseated, saidvalves being alternately seated by the pressure above them and thesprings, 13g, as the raised portions of the peripheries of the cams passclear of the stems.

Each of the cam shafts, 16, carries a spur gear, 16h, said spur gearengaging a corres onding pinion, 17, fixed on a crank shaft, 1 which isjournaledin bearings between the cylinders, 13. The'crank shaft, 17, visrotated by the motor, 5, through a chain, 17h, passing around a sprocketwheel, 5d, on the shaft of the motor, and around a corresponding wheel,17 c, on the crank shaft. By means of the construction above described,the shovels are swungy outwardly with comparative rapidity, to feed thefuel into the firebox. by the rearward movements of the pistons, 14:,and the rear ends of the cylinders, 13, being closed by the heads, 13a,the cylinder spaces adjacent to said .heads act as cushion chambers,which serve to reduce the speed of theshovels as they approach theoutward terminals of their traverse, and thereby to correspondinglyvreduce the strain on the operating mechanism.

The inward or return traverses of the shovels are effected, at a lowerrate of speed than their outward traverses by intermediate mechanismactuated by the crank shaft, 17, which, as before explained, is rotatedby the motor, 5. A double-crank, 17d, having a crank pin, 17, is formedon the crank shaft, 17, and the crank pin is coupledk by oppositelyextending links or connecting rods, 18, to two slide bars,- 19, whichare fitted to reciprocate in guides, 20, formed on or fixed to the lowerportions of thev cylinders, 13. An arm, 15C, is fixed on `each ofthe'gear shafts, 15, said arm assing freely through a slot in the sideof t e adjacent'guide, 20, and extending thereinto in position to becontacted with by a transverse bearing face, 19a, on the slide bar, 19,which moves therein. In the rotation of the crank shaft, 17 the gearshafts,15, will be alternately swung in their-bearings by the contact ofthe slide bars, 19, with the arms, 15, in direction to impart inwardforv return traverse to the shovels, through I ythe gears, .15" and 12,and will, through 'olie Contact of the arms, 15, with the pistons, 14,coincidently return the pistons to position for commencing their strokeswhich impart the outward or feeding traverse to the shovels, c., theposition shown on the left of Fig. 5.

It will be seen from the proportions of the gearing, that the speed ofrotation of the crank shaft, 17, is about four times as great as that ofthe cam shafts, 16, the object of this difference in speed being toenable eachi j modification in which the shovels swing completely aroundtheir axial lines in making their alternate outward and inwardtraverses, instead of swinging alternately forwardly and backwardly,through arcs of p circles, as in the instance before described.

In this construction, the fluid pressure mechanism for moving theshovels outwiardly is dispensed with, and both their outward and inwardtraverses are eected,

at relatively greater and lesser speeds, by gearin actuated .bythe-motor, 5, as indicated iagrammatically in Fig. 1Q. To this end, twoshafts, 21, vand 21a, either one of which, may, as preferred, be rotatedby appropriate connections, of ordinary known form, withe the motor, 5,are journaled in bearings intermediate of the shovel shafts, 12, 12, andsubstantially parallel therewith. An eccentric gear, 22, fixed on theshaft, 21, engages a similar gear, 22, on one of the shovel shafts, 12,and a concentric gear, 23, also fixed on the shaft, 21, engages asimilar gear, 2da, on the sh ft, 21, w ich carries an eccentric gear,24, engaging a similar gear,

1 24", on the other shovel shaft, 12. By this disposition of theintermediate shafts and gearing, and the proper relative adjustment ofthe eccentric gears, the two shovel shafts are swung in o positedirections, and their outward or fee ing traverses are effected athigher speeds than their inward or return traverses, as inthe instancefirst described.

In the operation of a mechanical Stoker embodying my invention, the fuelwhich is transferred from the coal bin of the tender to the locomotive,by the screw-conveyer, 2 y

drops from the forward end thereof, througli the'hoppen 8g, into theelevator casing, 8,

within which it is raised, in successive portionsor charges, by theflights, Sb, connected to the elevator chain, and the charges of fuelare moved through the upper horizontal member of the casing, andsuccessively delivered through the discharge passage, 8f, thereof, intothe shovel boX, 9. When one of the flights, 8b, has reached the righthand side of the discharge passage, the entire .charge of fuel in frontof this flight will have been'delivercd to the shovel box, in front ofone of the shovels, as, say, the left hand one, which is then-standingat the rear terminal of its traverse, the other shovel, as,

say, the right hand one, then standing at the forward terminal of itstraverse. The speed of the cam shafts, 16, which, as before eX- plained,are rotated by the motor, 5, and the adjustment of the cams, 16,thereon, are so regulated that the supply valve, 13, of the left handtiuid .pressure cylinder, 13, will be opened when one of the flights hasreached the right hand side of the discharge opening and the charge offuel in front of it has been delivered to the shovel box. Thepiston,1ll, of the left hand cylinder, 13, will thereupon be movedrapidly to the rear terminal of 'its stroke, and will, through itsconnections with the left hand shovel shaft, 12, swing the left handshovel, -with comparative rapidity, to the outward terminal of itstraverse, said shovel thereby gathering, upon the horizontal portion ofits blade, the

charge of coal in front of it, carrying said charge forwardly, andthrowing it into, and toward the left side of, the fireboX. When thisoutward terminal has been reached, the cam of the left hand cylinder hasmoved su'liicieiitly far vto permit the supply valve to be closed andpressure to be cut olf from the left hand cylinder. The right handshovel shaft, 12, is then, through` its connections with tlie adjacentslide bar, 19, turned in the opposite direction, and its shovel is swungbackwardly, at comparatively slow speed, to the rear terminal of itstraverse, it being free to move in the direction of the curved line inFig. Il, by reason of the left hand shovel then standing to the left ofsaid line. 4 The right hand shovel will then be in position behind thecharge of fuel delivered by the next succeeding flight, and will, whensaid charge is delivered, be actuated by the piston of the right handfluid pressure cylinder, in a similar manner to that above described,and will carry and throw this charge forwardly into, and toward theright hand side of, thc irebox, after which it will be returnedsimilarly to the left hand shovel.

It will be seen that by reason of the capability of the horizontallyswinging shovels, of picking up, holding, and carrying throughout theirtraverses, successive charges of fuel, -and of being projected, throughthe door opening in the rear wall of the firebox, partially into thelatter, they will, at the concluding portions of their forwardtraverses, throw the portions of ,fuel then remaining upon them, towardthe rear corners of the fiiebox. This is a function of prime importancein firing locomotive boilers, in which, unlike thc cylindrical furnacesof boilers of the-Scotch and Cornish types, the irebox is of very muchgreater width than the door opening, and is a function which is notwithin the capacity of swinging, rotating, or reciprocating blades,

. ing land throwing member, of hollowed or angular transverse section,adapted to pick up, hold, transport and project in differentdirect-ions, a4 charge of fuel, said membery being-connected with meanswhereby it is swung, in a horizontal plane, within a fuel receptacle,toward and from an opening 1n a furnace, into which it successivelydelivers the charges 'of fuel which it receives, indifferent-directions, during different portions of its traverse 4towardsaid opening. A shovelas above defined, differs both structurallyandoperatively, from the instances erzemplified` in the prior art, of'revolving plates or disks, upon which fuel is dropped, and from whichit is discharged by centrifugal force, and oscillating, rotating, orreciprocating wings, blades, or plungers, by which fuel is pushed, insubstantially one direction only, into a furnace.

I claim as my invention and desire to secure by Letters Patent j y l. Ina mechanical stoker, the combination of a receptacle into which fuel isdeli\-'erable,`

' a fuel carrying and throwing shovel adapted to traverse in saidreceptacle, between p ositions in'rear and in front, respectively, ofthe avenue- 'of fuel delivery thereto, said shove'hbeing adapted to pickup and carry, a charge of fuel 'in its forward traverse, and poweractuated means for imparting horizontally swinging movements to saidshovel.

2. In a mechanical stoker, the combination with a fuel receptacleadapted to communicat-e with a furnace opening, of. a fuel carrying andthrowing shovel mounted on a vertical shaft and having a horizontalswinging movement for project-ing the fuel through the opening anddistributing the same over the furnace grate, said shovel being adaptedto pick up and carry a charge of fuel in its forward traverse.

3. In a mechanical Stoker, the combinationV with a fuelrecptacle adaptedto communicat'e""with a furnace opening, of means for depositing fuelupon the receptacle, and a horizont-ally .swinging fuel carrying andthrowing shovel for scraping up and carry- =ing the fuel and projectingit through the opening into the furnace.

4. In a mechanical stoker, the combination with a fuel receptacleadapted to communicate with a furnace opening, of a fuel carrying andthrowing shovel mounted on al vertical shaft and adapted to pick up thefuel and swing horizontally through said opening to project the fuelover the grate.

A5. In a mechanical stoker, the combination with a receptacle adapt-edto communicate with a furnace opening, of a fuel carrying and throwingshovel having a horizontal inward and outward swinging movement fr andprojecting the fuel through sald opening, and mechanism fory turningsaid shovel rapidly through its outward traverse and more slowly'throughits inward traverse.

6. In a mechanical stoker, the combination with a fuel receptacleadapted to communicate with a furnace opening, of -a fuel carrying andthrowing shovel mounted in said receptacle and having a horizontalswinging movement forwardly and backwardly through said opening forpicking up and projecting the fuel over the furnace grate.

7. In a mechanical Stoker, the combination 'with a fuel receptacleadapted to communicate witha furnace opening, of a fuel carrying andthrowing shovelin said receptacle mounted on a Vvertical shaft andhaving a backward and forward horizontally swinging movement for pickingup and projecting said opening, and means the fuel through .forautomatically depositmg a charge of fuel within the recept-acle aftereach backward traverse of the shovel. 8. In a mechanical Stoker, thecombination with a fuel receptacle adapted to communicate withafurnace'opening, of two fuel carrying and throwing shovels mostnted onvertical shafts at opposite sides of the receptacle, and'havinghorizontal swinging movements through said opening and toward oppositesides of the furnace for picking up and distributing the fuelover thegrate.

9. In'a mechanical Stoker, the combination with a fuel receptacleadapted to communicate with a furnace opening, of two fuel carrying andthrowing shovels mounted on vertical shafts in said receptacle, saidshovels beingv adapted to pick up and carry charges of fuel in theirforward traverses, and means for imparting horizontal swinging movementsto said shovels alternately.

10. In a mechanical Stoker, the combination witha fuel receptacleadapted to communicate with a furnace openingf of two fuel carrying andthrowing shovels mounted on vertical shafts in said receptacle, saidshovels being adapted to ick up and carry charges of fuel in theirfiorward traverses, mechanism for imparting horizontal swingingmovements to said shovels alternately, a portion of the receptaclebeing-common to the traverse of each shovel, and means for depositingsuccessive charges of fuel at said portion of the receptacle. ,v

11. In a mechanical Stoker, the. combinaup and ca'rry a charge of fuelin its forward traverse, a fluid pressure motor, and Jintermediatemechanism, actuated by said motor, for horizontally Swinging said shovelin alternately opposite directions, vacross the avenue of fuel delivery.

12. In a mechanical stoker, the combination of a receptacle into whichfuel is deliverable, a fuel carrying and throwing shovel adapted totraverse/1n said receptacle between positions in rear and `in front,respectively, of the avenue of Vfuel delivery thereto, said shovel beingadapted to pick up and" carry a charg' of fuel in its forward traverse,and power actuated means for horizontally swinging said shovel, inalternately opposite directions, and at alternately highe and lowerspeeds, across the avenue of fuel delivery.

13. In a mechanical Stoker, the combination of a receptacle into whichfuel is deliverable, a fuel carrying and throwing shovel adapted totraverse in said receptacle, between positions in rear and in front,respectively, of the avenue of fuel delivery thereto, said shovel beingadapted to pick up and carry a charge of fuel in its forwardtraverse, afluid pressure motor, imparting horizontally swinging movement `to Saidshovel from rear to front, across theavenue of fuel delivery, and afluid pressure motor imparting swinging movement to said shovel, atlower speed, from front to rear, across the avenue of fuel delivery.

14. In a mechanical Stoker, the combination of a receptacle into whichfuel is deliverable, a fuel carrying and throwing shovel adapted totraverse in Said receptacle, between positions in rear and in front,respectively, of the avenue of fuel delivery thereto, said shovelbeinguadapted .to pick up and carry a charge of el in its forwardtraverse, a fluid pressure motor imparting horizontally swingingmovement to said Shovel,.

from rear to front, across the avenue of fuel delivery, .and a fluidpressure motor controlling the movements of Said first Specified motorand imparting swinging movement to Said shovel from front to rear,across the;

avene of fuel delivery.

' 15. In a, mechanical Stoker, the combination of' means for supplyingfuel to a locomotive, means. for elevating the Supplied fuel to a levelproper for firing, a receptacle into which fuel is delivered by saidelevating means, a fuel carrying and throwing shovel adapted to traversein said receptacle, between positions in rear and in front, re-

.-Spectively, of the .avenue of fuel delivery thereto, Said Shovel beingadapted to pick up and carry a charge of fuel in its forward traverse,and power actuated means for impart-ing horizontally swinging movementsto Said shovel.

16. In a mechanical stoker, the combination of means for supplying fuelto a locomotive, means for elevating the Supplied fuel to a level properfor firing, a receptacle into which fuel is delivered by said elevatingmeans, a fuel carrying and throwing shovel adapted to swing horizontallyin said receptacle, between positions in rear and in front,respectively, of the avenue of fuel'delivery, Said shovel being adaptedto pick up and carry a charge of fuel in its forward traverse, a Huidpressure motor, and intermediate mechanism, controlled by said motor,for effecting the feeding `and return traverses of said shovel atrelatively higher and lower speeds.

17. In a mechanical Stoker, the combination of a fuel receptacle adaptedto communicate with a furnace opening, a horizontally swinging fuelcarrying and throwing shovel mounted in Said receptacle for projectingthe fuel through said opening, said shovel being adapted to pick up andcarry a charge of fuel in its forward traverse, a fluid pressure motorfor swinging said Shovel through its outward traverse, another motor andconnecting mechanism for swinging said shovel through its returntraverse, and valve means operated by, said second motor for controllingthe supply of fluid to the first motor.

18. In a mechanical stoker, the combination of a fuel hopper on thelocomotive, a conveyer casing discharging into said `hop per andextending beneathy the fuel space on the tender, a conveyer mounted insaid casing, an elevator for raising the fuel from said hopper to thelevel for firing, a horizontally'swinging fuel carrying and throwingshovel for projecting the fuel into the furnace, said shovel beingadapted to picky up and carry a charge of fuel in its forward traverse,and power mechanism for operating the conveyer, elevator and shovel.

19. In a mechanical Stoker, the combina tion of a fuel receptacleadapted to communicate with a furnace opening, a horizontally Swingingfuel carrying and throwing shovel mounted in said receptacle forprojecting the fuel through said opening, Said Shovel being adapted topick up and carry a charge of fuel in its forward traverse, a fluidpressure motor for actuating said Shovel, and an exhaust connection fromsaid motor discharging into the receptacle adjacent to the shovel Shaft.

20. In a mechanical stoker, the combination of a fuel receptacle adaptedto communicate with a f urnace opening, and aihoriswing horizontallythrough the furnace openl? zontally swingmg shovel having atransing,said shovel having a transversely bent versely bent blade forI pickingup, carrying, and longitudinally curved blade for piokng and projectingfuel from the receptacle into up, carrying, and projecting the fuel. thefurnace openin e A G ELVIN 21. In a mechanical Stoker, the combinationof a fuel receptacle adapted to commu- Witnesses: ncate with a furnaceopening, yand a shovel F. W. MARTIN, mounted ,in said receptacleandadapted to `EMILY L. MYERS.

